The Setup Audit Trail is a tool that allows you to view and download a log of changes made in your org’s Setup area. The log shows up to 20 fields of information for each change, such as who made it, when it was made, what type of change it was, and what values were changed. You can use the Setup Audit Trail to track configuration changes directly in production and identify any unauthorized or problematic changes. One of the changes that the Setup Audit Trail tracks is when a user grants login access to another user. This means that you can use the Setup Audit Trail to see if any other administrators or delegated administrators are using the Log In As a User feature. References: https://help.salesforce.com/s/articleView?id=sf.monitorsetup.htm &type=5 https://help.salesforce.com/s/articleView?id=sf.remoteaccess_granting_login_access.htm &type=5

Debug Log is a tool that captures information about database operations, system processes, and errors that occur when executing a transaction or running a unit test. Debug Log can help troubleshoot issues related to triggers, workflows, validation rules, or other custom logic by showing the order of execution and the values of variables and expressions

Three recommendations that the administrator can make to reduce the file size of full data exports are:

Reduce the amount of objects per export. By selecting only the objects that are necessary for the backup and excluding the ones that are not, you can reduce the number of files and records that are exported and decrease the file size.

Deselect ‘Include images, documents, and attachments’ in the export. By unchecking this option, you can exclude the files that are stored in Salesforce as images, documents, or attachments from the export. These files can take up a lot of space and increase the file size significantly.

Keep deleted record counts to a minimum. By emptying the recycle bin regularly or using hard delete options, you can reduce the number of deleted records that are included in the export. Deleted records are still counted as part of the export limit and can increase the file size.

The other two options are incorrect because:

Requesting a backup file every 5 days does not reduce the file size of each export. It only increases the frequency of exports and may cause more storage issues.

Unselecting the recycle bin in the object export option does not reduce the file size of full data exports. It only applies to individual object exports and not to weekly or monthly exports.